Home / 918,307.40-1,378,117.20-386,210.30

Finding the Fourth Proportional to 918,307.40, 1,378,117.20 and 386,210.30

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Solution

The fourth proportional to 918,307.40, 1,378,117.20 and 386,210.30 is: 579,591.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,307.40 : 1,378,117.20 = 386,210.30 : x
  2. Step 2: Convert to fraction form
    918,307.40/1,378,117.20 = 386,210.30/x
  3. Step 3: Cross multiply
    918,307.40x = 1,378,117.20 × 386,210.30
  4. Step 4: Simplify right side
    918,307.40x = 532,243,057,247.16
  5. Step 5: Solve for x
    x = 532,243,057,247.16/918,307.40
  6. Step 6: Final answer
    x = 579,591.38

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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.