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Finding the Fourth Proportional to 686.99, 947.13 and 510.06

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Solution

The fourth proportional to 686.99, 947.13 and 510.06 is: 703.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    686.99 : 947.13 = 510.06 : x
  2. Step 2: Convert to fraction form
    686.99/947.13 = 510.06/x
  3. Step 3: Cross multiply
    686.99x = 947.13 × 510.06
  4. Step 4: Simplify right side
    686.99x = 483,094.77
  5. Step 5: Solve for x
    x = 483,094.77/686.99
  6. Step 6: Final answer
    x = 703.20

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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.