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Finding the Fourth Proportional to 651,647.70, 977,471.55 and 402,815.70

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Solution

The fourth proportional to 651,647.70, 977,471.55 and 402,815.70 is: 604,223.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,647.70 : 977,471.55 = 402,815.70 : x
  2. Step 2: Convert to fraction form
    651,647.70/977,471.55 = 402,815.70/x
  3. Step 3: Cross multiply
    651,647.70x = 977,471.55 × 402,815.70
  4. Step 4: Simplify right side
    651,647.70x = 393,740,886,643.34
  5. Step 5: Solve for x
    x = 393,740,886,643.34/651,647.70
  6. Step 6: Final answer
    x = 604,223.55

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.