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Finding the Fourth Proportional to 553,210.16, 763,421.56 and 311,491.98

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Solution

The fourth proportional to 553,210.16, 763,421.56 and 311,491.98 is: 429,854.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,210.16 : 763,421.56 = 311,491.98 : x
  2. Step 2: Convert to fraction form
    553,210.16/763,421.56 = 311,491.98/x
  3. Step 3: Cross multiply
    553,210.16x = 763,421.56 × 311,491.98
  4. Step 4: Simplify right side
    553,210.16x = 237,799,692,520.36
  5. Step 5: Solve for x
    x = 237,799,692,520.36/553,210.16
  6. Step 6: Final answer
    x = 429,854.17

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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.