Home / 665,749.37-918,475.93-423,988.67

Finding the Fourth Proportional to 665,749.37, 918,475.93 and 423,988.67

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Solution

The fourth proportional to 665,749.37, 918,475.93 and 423,988.67 is: 584,939.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,749.37 : 918,475.93 = 423,988.67 : x
  2. Step 2: Convert to fraction form
    665,749.37/918,475.93 = 423,988.67/x
  3. Step 3: Cross multiply
    665,749.37x = 918,475.93 × 423,988.67
  4. Step 4: Simplify right side
    665,749.37x = 389,423,387,987.71
  5. Step 5: Solve for x
    x = 389,423,387,987.71/665,749.37
  6. Step 6: Final answer
    x = 584,939.93

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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.