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Finding the Fourth Proportional to 677,073.60, 934,328.76 and 390,686.16

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Solution

The fourth proportional to 677,073.60, 934,328.76 and 390,686.16 is: 539,127.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,073.60 : 934,328.76 = 390,686.16 : x
  2. Step 2: Convert to fraction form
    677,073.60/934,328.76 = 390,686.16/x
  3. Step 3: Cross multiply
    677,073.60x = 934,328.76 × 390,686.16
  4. Step 4: Simplify right side
    677,073.60x = 365,029,315,421.96
  5. Step 5: Solve for x
    x = 365,029,315,421.96/677,073.60
  6. Step 6: Final answer
    x = 539,127.97

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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.