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Finding the Fourth Proportional to 713,130.32, 984,123.60 and 390,843.20

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Solution

The fourth proportional to 713,130.32, 984,123.60 and 390,843.20 is: 539,365.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,130.32 : 984,123.60 = 390,843.20 : x
  2. Step 2: Convert to fraction form
    713,130.32/984,123.60 = 390,843.20/x
  3. Step 3: Cross multiply
    713,130.32x = 984,123.60 × 390,843.20
  4. Step 4: Simplify right side
    713,130.32x = 384,638,017,019.52
  5. Step 5: Solve for x
    x = 384,638,017,019.52/713,130.32
  6. Step 6: Final answer
    x = 539,365.68

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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.