Home / 778,574.34-1,075,108.59-488,688.42

Finding the Fourth Proportional to 778,574.34, 1,075,108.59 and 488,688.42

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Solution

The fourth proportional to 778,574.34, 1,075,108.59 and 488,688.42 is: 674,814.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,574.34 : 1,075,108.59 = 488,688.42 : x
  2. Step 2: Convert to fraction form
    778,574.34/1,075,108.59 = 488,688.42/x
  3. Step 3: Cross multiply
    778,574.34x = 1,075,108.59 × 488,688.42
  4. Step 4: Simplify right side
    778,574.34x = 525,393,118,175.53
  5. Step 5: Solve for x
    x = 525,393,118,175.53/778,574.34
  6. Step 6: Final answer
    x = 674,814.33

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.