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Finding the Fourth Proportional to 520,688.40, 779,218.20 and 310,477.20

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Solution

The fourth proportional to 520,688.40, 779,218.20 and 310,477.20 is: 464,633.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,688.40 : 779,218.20 = 310,477.20 : x
  2. Step 2: Convert to fraction form
    520,688.40/779,218.20 = 310,477.20/x
  3. Step 3: Cross multiply
    520,688.40x = 779,218.20 × 310,477.20
  4. Step 4: Simplify right side
    520,688.40x = 241,929,484,925.04
  5. Step 5: Solve for x
    x = 241,929,484,925.04/520,688.40
  6. Step 6: Final answer
    x = 464,633.91

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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.