Finding the Fourth Proportional to 717,330,782.60, 989,885,894.53 and 399,774,130.70
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Solution
The fourth proportional to 717,330,782.60, 989,885,894.53 and 399,774,130.70 is: 551,671,254.85
Step by Step Solution
- Step 1: Write the proportion equation
717,330,782.60 : 989,885,894.53 = 399,774,130.70 : x - Step 2: Convert to fraction form
717,330,782.60/989,885,894.53 = 399,774,130.70/x - Step 3: Cross multiply
717,330,782.60x = 989,885,894.53 × 399,774,130.70 - Step 4: Simplify right side
717,330,782.60x = 395,730,772,975,923,712 - Step 5: Solve for x
x = 395,730,772,975,923,712/717,330,782.60 - Step 6: Final answer
x = 551,671,254.85
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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.