Home / 918,440.40-1,377,332.55-319,421.10

Finding the Fourth Proportional to 918,440.40, 1,377,332.55 and 319,421.10

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Solution

The fourth proportional to 918,440.40, 1,377,332.55 and 319,421.10 is: 479,017.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,440.40 : 1,377,332.55 = 319,421.10 : x
  2. Step 2: Convert to fraction form
    918,440.40/1,377,332.55 = 319,421.10/x
  3. Step 3: Cross multiply
    918,440.40x = 1,377,332.55 × 319,421.10
  4. Step 4: Simplify right side
    918,440.40x = 439,949,078,186.81
  5. Step 5: Solve for x
    x = 439,949,078,186.81/918,440.40
  6. Step 6: Final answer
    x = 479,017.56

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Double scale
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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.