Home / 563,981.60-778,323.12-309,356.48

Finding the Fourth Proportional to 563,981.60, 778,323.12 and 309,356.48

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Solution

The fourth proportional to 563,981.60, 778,323.12 and 309,356.48 is: 426,927.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    563,981.60 : 778,323.12 = 309,356.48 : x
  2. Step 2: Convert to fraction form
    563,981.60/778,323.12 = 309,356.48/x
  3. Step 3: Cross multiply
    563,981.60x = 778,323.12 × 309,356.48
  4. Step 4: Simplify right side
    563,981.60x = 240,779,300,705.82
  5. Step 5: Solve for x
    x = 240,779,300,705.82/563,981.60
  6. Step 6: Final answer
    x = 426,927.58

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Double scale
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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.